/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package Control;

import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

/**
 *
 * @author Jayson Kiong
 */
public class LoginValidation extends HttpServlet {

/** 
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /** 
     * Handles the HTTP <code>GET</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
            doPost(request, response);
    }

    /** 
     * Handles the HTTP <code>POST</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    /**
     * Validates the logging in of a user with his respective account
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        boolean withError = false;
        String[] error = {"",""};
        String username = request.getParameter("username");
        String password = request.getParameter("password");

        if(username.equals("")){
            error[0] = "username";
        }
        if(password.equals("")){
            error[1] = "password";
        }
        

        for(String errormsg:error){
           if(!(errormsg.equals(""))){
               withError = true;
               HttpSession session = request.getSession();
               session.setAttribute("errors", error);
               RequestDispatcher rd = this.getServletContext().getRequestDispatcher("/index.jsp");
               rd.forward(request,response);

               break;
           }
        }

        if(!(withError)){
               RequestDispatcher rd = this.getServletContext().getRequestDispatcher("/LoginServlet");
               rd.forward(request,response);
        }
    }

    /** 
     * Returns a short description of the servlet.
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>
}
